Solve the following system of equations . Enter the y-coordinate of the solution . Round your answer to the nearest tenth. 5x+2y =7. -2x+6y=9

Answers

Answer 1

Answer: 5x + 2y = 7
multiplying this equation by 2
10x + 4y = 14 ...(A)

-2x + 6y = 9
multiplying this equation by 5
-10x + 30y = 45 ... (B)

Add (A) and (B),
10x-10x + 4y +30y = 14+45

0 + 34y = 59

y = 59/34
y = 1.7

Related Questions

50 points! i honestly forgot how to do algebra lol can someone help me and explain the steps for me?2x + 14 = 18 x=?
A rectangular block of metal is 25cm long, 11cm wide and 9cm high. The metal block is melted down and all of the metal is used to make a cube. Work out the length of each side of the new cube formed
From the equations 7a = 4 and 7a + 4b = 12, one can conclude that b is?Please explain the work behind the solution
6x + y = 4 X - 4y = 19 Solving systems by substitution
Marjorie consumed 1.5 gallons of water in one day. How many milliliters are equal to 1.5 gallons, if 1 liter = 1,000 milliliters and 1 gallon = 3.785 liters

How do you use an exponent to represent a number such as 16

Answers

$16 = 4* 4 = 2* 2* 2* 2 = \boxed{2^4}$

2^4 is the answer because 2*2*2*2*
4*4
16

An artist is carving chess pieces from a large piece of marble. After carving ppp chess pieces, there are SSS pounds of uncarved marble remaining. As the number of chess pieces carved increases, what happens to the weight of the remaining, uncarved marble?

Answers

Answer:

The amount of marble will decrease as we make more chess pieces.

Step-by-step explanation:

An artist is carving chess pieces from marble. He has already carved p chess pieces and has s pounds of marble remaining.

We have to find out what happens to the remaining marble as chess pieces are being carved.

We are making chess pieces from the marble that is remaining , hence the amount of marble will definitely decrease.

As we go on making chess pieces, the marble will finish at a point of time.

What is (-m)^-3n, if m= 2 and n= -24?a. 3b. -3c. 4. d. -4

Answers

$(-m)^(-3)n\n\nm=2;\ n=-24\n\nsubtitute\n\n(-2)^(-3)\cdot(-24)=(1)/((-2)^3)\cdot(-24)=(1)/(-8)\cdot(-24)=(-24)/(-8)=3$

Answer: a. 3

What is 10 more than 56

Answers

66 is the answer (56+10)

10 more than 56 means 10+56
which equals 66

At Southside Middle School, 20% of the students play an instrument. There are 305 students. How many students play an instrument?/

Answers

Answer:

61 students

Step-by-step explanation:

When finding the percentage of a number, you can simply cross multiply and divide:

we can remove the percentage symbol…

$20*305=\n 6100$

Now 6100 divided by 100 is:

hope this helps!

A bus and a car leave from the same city traveling in opposite directions. The bus leaves 2 hours before the car does. The bus travels at a steady speed of 50 mph while the car travels at 70 mph. After how many hours will the bus and car be 800 miles apart?If h represents the number of hours the bus travels, then which of the following expressions represents the number of miles the car travels?

a.70(h + 2)
b.70(h - 2)
c.70h

Answers

The formula for this equation would be B. 70(h - 2)

Answer:

70(h-2) is the correct answer

Other Questions

determine whether the following is valid or invalid: it's easy enough to do logic if you think logically. fortunately, i have no trouble doing logic, so i guess i think logically.

Which set of polar coordinates describes the same location as the rectangular coordinates (0, -2)

Someone answer this for me please ..

A pote that is 3.5 m tall casts a shadow that is 1.08 m long same time, a nearby building casts a shadow that is 35.5 m long How tall is the building Round your answer to the nearest